September weather forecast and climate
Cedar Grove, NJ

The first month of the autumn, September, is also a moderately hot month in Cedar Grove, New Jersey, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 59.4°F (15.2°C).

Temperature

In Cedar Grove, New Jersey, the average high-temperature in September marginally drops, from 81.9°F (27.7°C) in August, to a still moderately hot 75°F (23.9°C). In September, the average low-temperature is 59.4°F (15.2°C).

Humidity

In Cedar Grove, the average relative humidity is 75%.

Rainfall

In Cedar Grove, during September, the rain falls for 13.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 153.3 rainfall days, and 24.92" (633mm) of precipitation is accumulated.

Snowfall

In Cedar Grove snow does not fall in May through October.

Daylight

In Cedar Grove, the average length of the day is 12.4h.

Sunshine

The average sunshine in Cedar Grove is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Cedar Grove?

In September, the average high-temperature is 75°F (23.9°C), and the average low-temperature is 59.4°F (15.2°C).

What is the average humidity in September in Cedar Grove?

The average relative humidity in September in Cedar Grove, New Jersey, is 75%.

How much does it rain in Cedar Grove in September?

In September, the rain falls for 13.2 days. Throughout September, 1.46" (37mm) of precipitation is accumulated.

When it does not snow in Cedar Grove?

May through October are months without snowfall in Cedar Grove.

What is the average length of the day in September in Cedar Grove?

The average length of the day in September is 12.4h.

How many hours of sunshine does Cedar Grove have in September?

The average sunshine in September in Cedar Grove, New Jersey, is 8.8h.

How high is the UV index in September in Cedar Grove?

In September, the average daily maximum UV index in Cedar Grove, New Jersey, is 4. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Cedar Grove, NJ
  • Average high temperature in September: 23.9°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (1.8°C).

  • Average low temperature in September: 15.2°C

The month with the highest average low temperature is July (19.8°C).
The coldest month (with the lowest average low temperature) is January (-4.5°C).

Average pressure in September - Cedar Grove, NJ
  • Average pressure in September: 1017.8mbar

The month with the highest atmospheric pressure is November (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in September - Cedar Grove, NJ
  • Average wind speed in September: 10.1km/h

The windiest months (with the highest average wind speed) are January and March (14.1km/h).
The calmest month (with the lowest average wind speed) is July (9.2km/h).

Average humidity in September - Cedar Grove, NJ
  • Average humidity in September: 75%

The month with the highest relative humidity is February (78%).
Months with the lowest relative humidity are April and August (72%).

Average rainfall in September - Cedar Grove, NJ
  • Average rainfall in September: 37mm

The wettest month (with the highest rainfall) is July (78mm).
The driest month (with the least rainfall) is January (35mm).

Average rainfall days in September - Cedar Grove, NJ
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in September - Cedar Grove, NJ
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (83mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September - Cedar Grove, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6.8 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Cedar Grove, NJ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in September - Cedar Grove, NJ
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).

Average UV index in September - Cedar Grove, NJ
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Cedar Grove, NJ
  • Average cloud cover in September: 36

Months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in September - Cedar Grove, NJ
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).